397587767117 has 2 divisors, whose sum is σ = 397587767118. Its totient is φ = 397587767116.

The previous prime is 397587767039. The next prime is 397587767131. The reversal of 397587767117 is 711767785793.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 344421091876 + 53166675241 = 586874^2 + 230579^2 .

It is a cyclic number.

It is not a de Polignac number, because 397587767117 - 2¹⁸ = 397587504973 is a prime.

It is a super-2 number, since 2×397587767117² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (397587761117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198793883558 + 198793883559.

It is an arithmetic number, because the mean of its divisors is an integer number (198793883559).

Almost surely, 2^397587767117 is an apocalyptic number.

It is an amenable number.

397587767117 is a deficient number, since it is larger than the sum of its proper divisors (1).

397587767117 is an equidigital number, since it uses as much as digits as its factorization.

397587767117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108909360, while the sum is 68.

The spelling of 397587767117 in words is "three hundred ninety-seven billion, five hundred eighty-seven million, seven hundred sixty-seven thousand, one hundred seventeen".